Element of building construction



April 11, 1939.

J.E.$CHUMACHER ELEMENT OF BUILDING CONSTRUCTION Filed Nov. 1, 1957 C) (D (3 C) C{///"C n I a 15 5 2 INVENTOR/ ATTORNEY.

Patented Apr. 11, 1939 UNITED STATES PATENT OFFICE 8 Claims.

This invention relates to plaster board, wallboard, plaster lath or similar building materials; and has for its object to provide new articles of manufacture of this general character which will be superior with respect to relative simplicity and inexpensiveness in production and make-up, durability and stability in use and service, and which will be particularly adapted for intimate and dependable bonding as between such building materials and plaster or other plastic material applied thereto. The invention relates equally to both fabricated and molded or pressed or initially plastic building materialsof the character stated.

With the above and other objects in view, the invention consists in the novel and useful formation, construction, conformation, interrelation and make-up of parts, members and features, all as hereinafter described, shown in the drawing and finally pointed out in claims.

In the drawing:

Fig. 1 is a fragmentary plan view of a portion of a sheet of plaster lath molded in accordance with the invention;

Fig. 2 is a similar view of the opposite or reverse face thereof;

Fig. 3 is an enlarged facial or obverse surface view of the building material shown in Figs. 1 and 2; Fig. 4 is a sectional view taken upon the line 4-4 of Fig. 3, looking in the direction of the appended arrows, a mass of plaster being shown as applied to a portion of the obverse face thereof, or the face displayed in Fig. 1; and

Fig. 5 is a sectional view upon an enlarged scale taken upon the line 55, Fig. 3, and showing plastic material applied to the element of building construction.

Referring with particularity to the drawing, I have shown therein a wallboard or plaster board or plaster lath structure, the same being illustrated as devoid of any facial sheets or coverings, paper or the like. Formed in and through the body of the material are a plurality of openings, perforations or holes I) which may be produced in any suitable manner as by punching or molding, and said openings are of varying transverse dimensions, being enlarged or flared as at 5 at the face c, the holes ranging thence, in the form shown in the drawing, cylindrically to and through the facial portion 01, which face is slightly countersunk as at 6 surrounding the cylindrical portion of the perforations or holes, so that the said cylindrical portion in each instance merges into the frusto-conical or conoidal or flaring or conical opening portion 5 developed through the facial portion and into an annular depression 6 formed in the facial portion d. Both of these perforation "formations tend to and are adapted to interlock effectively with a mass of plaster or plastic covering or material such as e, which is shown in Figs. 4 and as applied to the surface portion (1 of the building material and to invade and pass through and into and beyond the flaring opening portions 5 developed to and through the facial portion 0, thus producing a protuberance and enlargement i overlying the facial portion 0 and acting as a wedge or button to inter-engage the plaster mass and building material when the former has hardened or set. Also, the plastic mass 6 in invading the countersunk portions 6 in the facial portion d of the building material similarly interlocks therewith and is prevented from shifting in a direction parallel with the faces of the same. In order to further effectively interengage the plastic material e and the building material structure, I preferably subdivide the facial portion (1 thereof as to produce a plurality of facial projections 8, and this may be accomplished by molding or forming or providing a plurality of intersecting channels 9 extending in angular relation to each other across the facial portion d. In the particular formation shown in the drawing, these channels 9 are so arranged and so intersect each other in rectangular relationship that the projecting portions 8 are square in outline or facial formation, but they may obviously be of varied forms and contours in accordance with the desiderata of a given use or installation or service. When the plaster mass is applied to the facial portion d; for intrusion into and protruson through the openings 1), and for interlocking with the countersunk portions 6 of the facial portion d, it likewise enters the channels 9, and the projections 8 therefor invade the plastic mass and act as keys or interlocking members for further positively joining together the building material and the plastic material and preventing displacement of the latter from or shifting of the latter along the former. The plaster is thus effectively held in place not only by the holes or openings 1), each of varying transverse dimensions, but by the countersunk portions 6 and also the projecting square surface portion (1.

It is obvious particularly that many changes may be made with respect to the formations and contours of the openings 2) and the respective portions thereof. that extend to the faces 0 and d respectively, and with respect to the formation of the countersunk portions 6 of the surface portion d and the protruding portions 8 and channel portions 9 of the latter, all Within the obvious scope and sphere of the invention.

It is also obvious that many changes may be made in practicing the invention in departure from specific features and make-up pictured in the drawing and heretofore described, and I do not desire to be understood as limiting the invention to any such details.

Having thus disclosed my invention, I claim and desire to secure by Letters Patent:

1. An element of building construction having faces and provided with an opening for reception of plastic material, said opening being of varying transverse dimensions, there being a recessed portion of the element about one outlet of said opening, said element being provided at one facial portion with projecting portions.

2. An element of building construction having faces and provided with a transverse opening for the reception of plastic material and with facial projections to invade such plastic material; there being a recessed portion of said element about one terminal portion of said opening.

3. In combination with an element of building construction having faces and provided with through openings of varying transverse dimensions and projections from one face of said element, plastic material massed in said openings and invaded by said projections and interlocked therewith upon hardening, said element being recessed about a terminal portion of said openings and likewise therein receiving said plastic material.

4. An element of building construction having faces and provided with a transverse opening for the reception of plastic material and with a facial projection adjacent said opening to invade such plastic material; there being likewise a recessed portion of said element about one terminal portion of said opening.

5. An element of building construction having faces and provided with a transverse opening and a projection adjacent said opening from one face of said element, and plastic material massed in said opening and invaded by said projection and interlocked therewith upon hardening.

6. An element of building construction having faces and provided with a transverse opening and a projection adjacent said opening from one face of said element, and plastic material massed in said opening and invaded by said projection and interlocked therewith upon hardening; said element being likewise recessed about opening and likewise receiving said plastic material.

7'. An element of building construction having faces and provided with an opening for reception of plastic material, said opening being of varying transverse dimensions, there being a recessed portion of the element about one outlet of said opening.

8. An element of building construction having faces. and provided with an opening for reception of plastic material, said opening being of varied transverse dimensions, there being a recessed portion of the element about an outlet of said opening of. relatively lesser dimension.

JOSEPH E. SCHUMACHER. 

